单选题_______ medicine works in

问题补充：

单选题_______medicineworksinahumanbodyisaquestion_______noteveryonecanunderstandfully.A.How; thatB.That; whichC.That; whichD.What; that

答案：

A解析考查名词性从句和定语从句。从句How medicine works in a human body在句中做主语。定语从句That not everyone can understand fully修饰先行词question，that指代question在句中做understand的宾语。句意：药物如何再人体中起作用是一个不是所有人都能完全理解的问题。